Aliens needing water?

when our scientists investigate whether their was life on mars or some other far away planet...they always seem to be looking for traces of WATER...

who says aliens need water?? if they do exist ..doesn't mean they are exactly like us... they might...

not need water... even tho its a living thing... they could survive on melted lava for example... you get my drift... I know its sounds stupid to us.. because we survive on water... and if we drunk lava we would burn to death and die...

you know what I mean??

Life comes in many different forms in many different invoroments.They may exsist in extream tempretures and under extream pressures.They come in different sizes and colours and many breath different gases.Most are sub intellegent who over thousands of years have abdapted to there unique enviroment.Earth is one.There must be trillions of others worlds out there in the universe that support some kind of life.

well if everythin on earth needs water to survive they would no that if der are planets wit water on them they might have life on them too

well if everythin on earth needs water to survive they would no that if der are planets wit water on them they might have life on them too

Over the centuries Mars has lost water and become dry so if there was water then there was a possibility that Martians or aliens could have preserved some water for agriculture since they needed something to eat.This is a theory.Recently traces of pure water have been found on Mars.

Carbon-based life certainly needs water, and lots of it. While it's possible there is non-carbon based life out there (silicon-based, for example), nobody has come up with a convincing biological chain to support it - certainly not one that doesn't require water.

So given that the only viable type of life we're aware of is carbon-based, and given that carbon-based life requires lots of water, the highest return way to look for alien life is to look for places with lots of available water. We might miss something, but we're more likely to have success than if we had to examine absolutely everything.

that makes a lot of sense xsteffx

mainly because here on earth everything living, plant, animal, human ect
needs water to survive
so naturally theyd look for water
or some kind of liquid that would resemble what water does

Every living thing science knows survives in some form by using water. If there were primitive species on other planets, it's all they know to look for. We all started out on algae growing on rocks in WATER and progressed to fish then reptiles then monkeys and so on. Even if there were a primitive or complicated species growning on some other planet living off of lava, I'm sure it would be way more complex than humans, causing scientists to genetically modify a cow so it can eat molten rocks and still produce milk. Of course we'd eventually run out of rocks...
But what I'm saying is, it's all they know to look for.